Calculator.



E. C, WALTER.'

CALCULATOR. APPLICATION FILED JUNE 8, 1908.

Patented Jan. 2,1912.

3 SHEET$SHEET 1 MVENTOI? EDWARD C. WA LTE R Br EisATrOR/W Z,

E. 0. WALTER.

CALCULATOR.

' Patented Jan. 2, 1912.

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WITNESSES INVENTOR %&.;... EDWARD CWALTER E. 0. WALTER. CALCULATOR. APPLICATION FILED JUNE 8, 1908- I 1,013,243. Patented Jan. 2, 1912.

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5 g qigg-i; E1: E1 :1" 551?? I -IIEFIIIIIIEI W/T/VESISES I INVENTOR I E1) w'A R1) C. WALTER I 1 Erma New York, in the county of during the operation of the number-wheels means whereby carrying from one 7 wheels and the UNITED STATES PATENT OFFICE.

EDWARD C. WALTER, OF YORK, 1 l'. Y., ASSIG-NOR TO HARRY T. AMBROSE, OF

ORANGE, NEW JERSEY.

CALCULATOR.

Specification of Letters Patent. 7 Application filed June 8 Patented Jan. 2, 1912.

1908. Serial No. 437,355.

To all whom it may concern Be it known that I, EDWARD C. WALTER, a citizen of the United States, residing at New York and State of New York, have invented certain new and useful Improvements in Calculators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in calculators, and more particularly to calculating attachments for typewriting-machines, where it is frequently desired to tabulate a series of numbers and at the same time, obtain a totalof the amount of such numbers. I

Oneof the objects to be attained is a callculator, having such relation to the typewriter keys thatthe depression of the number keys of the tion of the number-wheels of the calculator.

An additional object is the provision of numberwheel to the other is; automatically effected by the typewriter keys. I

Another object of the invention is to obtain a simplified mechanism for resetting the number-wheels of the calculator to zeroposition. 7

Still a further object is the provision of improved means for preventing 1 reverse movement of the number-wheels of the calculator.

With these ob ects in view, my invention comprehends, briefly, a plurality of toothed, segmental arms connected to and adaptedto be operated by the numeral-keys of the typewriter. The number of teeth on each arm corresponds to the number of that particular numeral-key, that for number one being provided with one tooth, number two with two teeth and so on up to mesh with pinions on a shaft, upon which shaft is fixedly mounted a master-wheel. As the carriage moves across, the parts become relatively positioned so that the master-wheel is positioned for successive operation upon a plurality of movable-bars included within the calculating attachment; which comprises a series of number-wheels, and instrumentalities between such numberaforementioned movabletypewriter effects opera-' nine. These arms effected by the numeral keys, is communicated to the number-wheels and moves them a corresponding extent. Each number wheel is provided with a suitable lug which engages a carrying-arm arranged to engage the next adjacent number-wheel and move the same one increment as the numberwheel of lower denomination completes its revolution. Suitable means are provided for. returning the movable-bars and the car-- rylng-arms to their normal positions after operation.

Other objects and advantages will appear presently as the following detailed description proceeds.

In the drawings, wherein I show a preferred embodiment of my invention, Figure 1 is a side elevation, with parts broken away of the calculator as applied to 'a flatplaten typewriter. viewof the calculator. Fig. 3 is a detail view in side elevation of a number-wheel with its cooperating carrying device. Fig. 4 is an edge elevation of the same. Fig. 5 isa detail view showing the toothed segmentalarms, and the arrangement of teeth thereon. Fig. 6 is a top plan view of a porthe numeral-keys, the master-wheel supported upon the rock-shaft. Fig. 7 is a View in perspective showing an agroupment of a plurality of calculators.

Referring more particularly to the drawings, 'inwhich like reference characters refer to corresponding parts in the several views, A designates the line-spacing carriage of the Donning typewriter, (as shown, for instance, in U. S. Patent No. 826,483, July 17,1906) which I have shown as a convenient illustration of the usual form of fiatplaten typewriting machine, it being understood that the invention is susceptible of application to round-platen machines 1 as well. B is the letter-spacing carriage thereof.

Master-means and operating mechanism for the same.-B designates one "of, the numeral-keys on the letter-spacing carriage and B 'the key-lever connected thereto. B is an arm which may be integral with or connected to the key-lever to be operated. therewith. Each arm B is provided-with a plurality of teeth, corresponding in number with the number, on the respective numeraL key. The teeth of the arm B are adapted tion of the letter-spacing carriage, showing.

bars, whereby the movement of the bars,

i to mesh with. a

carried on the side of gear C pinion B mounted on the shaft B which is supported on the letterspace carriage, therebeing one of these pinions for each'toothed arm, "as shown clearly in Fig. 6. B is a master-wl1eel arranged centrally of the shaft. B and arranged to engage and operate the instrumentalities of the calculating-attaohment.'f B is a spring for returning the shaft 13 to normal position after its operation, and'B, B are cooperating stops carried by the shaft and let ter-space carriage respectively, said stops serving to properly limit the return move.- ment of the shaft. Thus, it will be noticed,

that when a particular numeral-key is depressed, its respective toothed arm is moved to engage the shaft upon which is mounted the master-wheel, and the shaft is thereby moved a distance corresponding to the numeral-key, that is, the arnrhaving only one tooth. will move through a great distance, or nearly the entire stroke before engaging its pinion, the arm having two teeth will move through a slightly less distance before engaging its pinion, and so on up to nine, in which case the arm engages the pinion immediately and imparts motion to the pinion throughout its entire movement.

The caZouZa tinghttac/zment.-The calculator is designated by C, the casing thereof being provided with an arm C by which it is positioned on the rear rail D of the line space carriage, a set screw D being employed. to secure it in position. Each number-wheel and its associated parts are similar in all respects, and a description of one will therefore siiflice for all. C is a bar hav ing a series of. rack teeth on its upper and lower sides andat opposite ends. The lower set of teeth are positioned to be engaged by the master-wheel B whereas the teeth on the upper side mesh with a toothed segmental plate C loosely mounted on shaft C Also looselymounted on the shaft C is a gear C which meshes with a pinion 0 Gear C in turn engages a pinion C which is mounted on the side of gear C and C is positioned to mesh with the number-wheel E. C is a.

spring-pressed pawl which is mounted on the segmental plate C and is in engagementwith the gear C Hence, as the bar C moves inwardly, and thereby turns the segmental plate C pawl C moves the gear-C and through the intermediate gearing, turns the n.un 1ber-wheel E an amount corresponding to the extent of movement of the master-wl'ioel. A spring C is secured to a pin on the bar C and to a post C thereby causing a return of bar C to normal position after its operation. to the casing and lies in fore-mentioned pin on limit eing C serving to the return movement of the bar. There no return movement of the gear, the

pawl C will slide over the teeth of gear C on the-backward movement of the segmental plate.- A spring C is attached to the side of the casing and is in engagement with the teeth of gear C in order to wardmovement of the gear and the numberwheel operated thereby. erably and as shown, slide through elongated apertures 0 in the front portion of the casing C beneath the arm C and, moreover, are held in operative position by a combpiece depending from the lower face'of said arm. C. By these means, the rack-bars are maintained constantly in operative position and in constant engagement with the segmental plates C and against any displacement from their longitudinal path of movement. I Garry dag mechanism.-Mounted on the sideof the number-wheel E is a lug or pro jection E, which carrying arm E as the number-wheel E completes a revolution. The carrying arm I L is provided with a spring-actuated pawl 1 E which is arranged to engage one of a series of ratchet teethE upon the side of the adjacent number-wheel F. The carryingarm is pivoted on the shaft E and held in normal position against stop-bar E by a spring E When the projection E" engages the carrying-arm, it is moved downward and its pawl'E being in engagement with the ratchet teeth on the ad' Jacent number-wheel, g ves such number-wheel a movement of one degree, as the-number-wheel of lower order eompletes'one revolution. E designates the spring which returns pawl E to normal. en-

gaging position.

Zero-producing means.-In order to reset all the number-wheels to zero position, I employ the devices now about to be described. Gear C, which carries at one end a milled knob C C" is a spring actuated pawl carried by the gear C and positioned to engage 'the spline in shaft C. When it is desired to re set the number-wheels to Zero position, the knob C is turned, which causes the shaft C to rotate and to engage all of the pawls by means of the aforementioned spline. and as soon as all zeroes appear at the register [,openings, rotation of continued.

General 0perati0a-Upon depressing, for instance, number eight numerahkey ot' the typewriter, the corresponding toothed arm (provided with eight teeth) is moved, through its cooperating rock-shaft and the master-wheel a similar distance. The master-wheel, being in engagement with one of the rack bars of the calculator, moves such rack bar inwardly, turning the segmental plate and its pawl, which in turn moves the gear C and through pinion, turns the the intermediate gearing actuates the'numprevent reare The bars C, pref is arranged to engage the.

is mounted loosely on a splined shaft and the shaft may be disv menw her-wheel directly. If the adding be eight r units carries the number-wheelbeyond the nine position, then one unit will automatically be carried to the number-wheel of next higher order by the instrumentalities already described.

The calculator may be adjusted to any position along the rear rail 'D." to accommodate different parts of the tabulating sheet."

forth, I do not limit myself to the exact structure described and various changes and modifications may be employed without. de-

parting from the scope or spiritof my invention. I l

That I claim, and.desire to secure by Letters-Patent is z 1. In a typewriting-machine, the combi nation with a calculating-attachment, of a letter-space carriage, printing keys carried thereby, toothed arms connected to said printing keys, a rock-shaft carrying a master-wheel cooperating with the aforesaid calculating-attaclnnent, a plurality of pinions carried by the rocinshaft and arranged to be engaged by the aforesaid arms and a plurality of oscillating by, and operable'in, said calculating-attachment and with which said master-wheel cooperates successively.

2. In a typewrit-ing-machine, the combination with a calculatingattachment, of a letter-space'- carriage, printing keys carried thereby, toothed arms connected to said printing keys, a rock-shaft carrying a master-wheel cooperating with the aforesaid calculating-attachment, means for turning said rock-shaft from the aforementioned arms, means for returning the rock-shaft to normal position and a plurality of oscillating members supported by, and operable in, said calculating-attachment and with which said master-wheel cooperates successively.

3. In a typewriting-inachine, the combination with a calculatlng-attachment, of a letter-space carriage, thereby, a rock-shaft, a master-wheel upon said rock-shaft and cooperating with the calculating-attachment, toothed arms connected to'said printing keys and effecting movement of the rock-shaft, means for re-- turning said' rock-shaft to normal position, means for limiting such return movement and a plurality of oscillating members supported by, and operable in, attachment and with which said masterwheel cooperates successively.

4. In a typewriting-machine, the combi nation with an adjustable calculating-at tachment, of a letter-space carriage, print-- different columns of figures sepamembers supported printing keys carried said calculatingingkeys carried thereby, a rock-shaft carrying a master-wheel adapted to cooperate with the calculating-attachment, toothed arms connected to the printing keys and 0perable upon the rock-shaft and a plurality of oscillating members supported by, and operable in, said calculating?attachment and with which said master-wheel cooperates successively. 5. In a typewriting-machine, the combination with a letter-space carriage, of a calculating-attachment adjustably mounted on the rear rail thereof, printing keys sup= ported on the letter-space carriage, a rockshaft carrying a master-wheel cooperating with the calculating-- attachment, toothed arms connected to the -printing keys and serving to operate said rock-shaft and a plurality of oscillating members supported by,

and operable in, said calculating attachment and with which said master-wheel cooperates successively.

6. ,In a typewriting-machine, the combination with a letter-space carriage, of mastor-means carried-by said letterspace carriage and having a horizontal traveling movement with said carriage, and a relatively-stationary calculatingattachment, including a plurality of horizontally-arranged and successively-actuated rack-bars, operable by said master-means. i

7. In a typewriting-machine, the combination with aletter-space carriage, of a master-wheel.carried by said letter-space carriage, and a calculating-attachment including a plurality of horizontally-arranged and successively-actuated rack-bars operable by the said masterwheel.

8'. In a typewriting-machine, the combination with a letter'space carriage, of a rock-shaft supported thereon, a masterwheel fixed on the rockshaft, a series of printing keys, toothed arms connected to the printing keys and operating to turn said rock-shaft, and a calculating-attachment including a plurality of rack-bars positioned for engagement with the aforementioned master-wheel.

9. In a typewriting-machine, the combination with a letter-space carriage, of a rock-shaft supported thereon, a masterwheel fixedupon the rock-shaft, a series of pinions also mounted on the rock shaft, printing keys on the letter-space carriage, toothed arms and engaging with said pinions, and a cal culating-attachment including a plurality of rack-bars positioned for engagement with the aforementioned master-wheel.

10. In a typewriting machine, the co1nbination with a carriage, of a calculating attachment including a plurality of rackbars slidable in a plurality of directions and always in the same longitudinal path, and

connected to the printing keys ing in relation to the calculatingattachment ating the n[whiting-attachment, said infor operating said rack-bars successively. srrumentalities being positioned to be en- In a typeWriting-machine, the com- 1 gaged by the teeth on the other end or said bination with a letter-space carriage, of a bar. calculating-attachment including a plurality l8. In a typewritingmachine, the com- 70 of rack-bars, and a master-wheel supported bination with a letter-spaclng carr age, of a on the letter-space carriage for operating lt-lfttlVfily stationary caleulating-attachment said rack-bars successively. including a number-Wheel, a hor1zontally- 2. In a typeWriting-machine, the comdisposed and shdable rack-bar, intermediate 19 bfu'a-tion with a letter-space carriage, of an gearing between the number-Wheel and rack- 75 adjustable calculating-attachment including bar and a master-means onthe letter-space a, plurality of rack-bars, and a master-Wheel carriage and traveling hoi'iaontally theresupported on the letter-space carriage for ltl1 relative to the ealculat1ng-attaehment operating said rack-bars successively. tor engagement with the rack bar. 3.5 18. In a typeWriting-machine, the com- 19. In a typewriting-maclnne, the combination with a letter-space carriage, of a bination With a letter-space carriage, of a calculating-attachment including a numline-spacing carriage, a rear rail on said V line-spacing carriage, a calculating-attachher-wheel, a horizontally-disposed and slldable rack-bar, intermediate gearing between ment adjustably mounted on said rear rail 2o 01' the line-spacing carriage, a plurality of the number-wheel and rack bar, and a master-wheel on the letter-space carriage for enraclebars included Within said calculatingattachment, and master-means supported on gagement with the raclebar.

the letter-space carriage for operating said 20. In a typewritlnganachine, the comrack-bars successively. bmation with a letter-space carriage, of a 14. In a typeWriting-machine, the comcaleulatirig-attachment including a number- 9o bination \vith'a letter-space carriage, of a wheel, a horizontallydisposed and slidable line-spacing carriage, a rear rail on said raelebar for operating said number-Wheel,

' and a master-means having a horizontal line-spacing carriage, a calculating-attaehment adjustably mounted on said rear rail traveling movement to be operatlvely assomated with the rack-bar. 95

ot the line-spacing carriage, a plurality of rack-bars included Within said calculating- 21. In combination, a typewriting maattachment, and a master-Wheel supported chine including a support and a calculating attachment mounted on said support, a caron the letterspace carriage for operating a said rack-bars successively. riage disposed to travel in uxtaposntton to 15. In a typewriting machine including in combination, a spacing-carriage, a calc'ulatingattachment arranged in juxtaposition thereto and including a plurality of succossively-actuated rack-bars, each having 40 a sliding movement in two directions and always in the same longitudinal path, means supported on said carriage and traveling therewith relatively to the calculating-attachment for operating said rack-bars, in-

strumentalities for returning the raclrbars to normal position, and means for limiting such return movement.

16. In a typeWriting-maehine, the combination with a lotter-space carriage, of a caleulating-attaehment including a bar having teeth disposed on opposite sides thereof, a master-Wheel carried by the letter-space carriage and arranged to engage the teeth on one side, and instrumentalities for actw ating the calcidating-attachment, said instyunentalities being arranged to be engaged by the teeth on the opposite side of said bar.

17. In a typeWriting-machine, the c0mbination With a letter-space carriage, of a calculating-attachment including a bar mounted to travel with said carriage, and a series of slidahle bars reciprocable longitu dinally and always in the same longitudinal path and adapted to be engaged by said keyin juxtaposition to the same.

22. In a typeWriting-maehine, the combination with a letter-space carriage, of a caleulating-attachment including a numberrack-bar for moving said number-Wheel, a master-means uponthe letter-space carriage and having a horizontal traveling movement therewith and adapted'to engage said rack-bar, and means for permitting move- 115 mentof the rack-bar'in one direction While the number-Wheel is at rest.

In a typeu'riting-machine, the combination With a letter-space carriage, of a calculating-attaehment including a series of 120 number-Wheels, a plurality of rack-bars horizontally-disposed and longitudinally shiftable successively for operating said number-Wheels, and a master-means upon zontal traveling movement therewith and having teeth disposed at opposite ends therearranged to engage said rack-bars succesot, master-means mounted on the lettei spacc sively. carriage and arranged to engagethe teeth 24. In a typewriting-machine, the comhiat one end, and instrumentalities for actunation with a letter-space carriage, of a cal- 131? said attachment, key-operated mechanism-10c operated mechanism asthe carriage travels Wheel, a horizontallydisposed and slidable ,the' letter-space carriage and having a hori- 12$ culating-attachment including a series of number-wheels, a .plurality of rack-bars horizontally-disposed and longitudinally shiftable successively for operating said 5 number-wheels, and a master-wheel ,upon the letter-space carriage arranged to engage said rack-bars successively. I

25. In a typewriting-machine, the combination with a calculating-attachment, of" a carriage and printing keys, a rockshaft provided with a master-means with the calculatingattachment, and connections between the rock-shaft and printing keys-and a series of horizontally-disposed toothed members partly housed within the calculating attachment and coiiperating with said master-means to actuate them successively.

26. In a typewriting-machine, the combination with a calculating-attachment, of a carriage and printing keys, a rock-shaft carryin a master-means cooperating with the said calculating attachment, toothed arms connected to the printing keys, and a plurality of pinions carried by the rockshaft and arranged to be-engaged by the aforesaid arms and a series of horizontallydisposed toothed members partly housed within the calculating attachment and cooperating with said master-means to actuate them successively.

27. In a typewriting-machine, the combi-' nation with a calculatmg-attachment, of a carriage and printing keys, toothed arms connected to said printing keys, and a master-means cooperating with the calculatingattachment and actuated by said toothed arms and a series of horizontally-disposed toothed members partly housed within the calculating attachment and cooperating with said master-means'to actuate them suc cessively.

28. In a typewriting-machine, the combination with a stationary calculating-attachment, of' a carriage and printing keys, a rock-shaft upon the carriage, mastermeans mounted on the shaft and cooperating with the calculating-attachment, toothed arms connected to the printing'keys, and a 50 plurality of pinions carried by the rock .haft and adapted to be engaged by the aforesaid arms and a series of disposed toothed ,members partly housed within the calculating attachment and coto actuate operating with said master-means them successively- 29. In a typewriting machine, the combination with a stationary calculator-casing, a plurality of horizontally-slidable and successively-engaged bars normally extending outside of and having a movement into the casing, said bars having a slidin movement in a plurality of directions and always'in theysame longitudinal path, means for maintaini'mg said bars against sidewise movement I v I cluding a plurality for cooperationhorizontallyout of said path while sliding in any direction, a travelmg carrlage member supported on the typewriting machine, and means carried thereby and outside and independent of the casing for moving said bars. v

30. The combination with a calculator inof bars, of a traveling support. mounted outside and independently of said calculator, support and having means mounted thereon for moving the bars in a longitudinal path,

and instrumentalities for operating said shaft. I

31. The combination with a calculator, of a series of keys, toothed arms connected to the keys, engagement with said arms, and means carried by the shaft for effecting operation of the beforementioned calculator and a horizontally-disposed successively-actuating series of toothed members supported partly within said calculator.

32. In a typewriting machine, a frame, Ia

carriage supported thereon, a calculator, a

plurality mally extending outside of and having a horizontal movement into and out of the calculator, the reciprocatory movement of.

the bars belng always in the same longitudinal path, means for controlling the actuation of the bars within said path of movement, and means movable with the carriage a shaft carried by said of successively-engaged bars no-ra shaft provided with pimons for and successively engaging said bars to efiect their inward movement.

- The combination with a calculator, including a plurality of successively-actuated rack-bars, each movable in two directions in the same longitudinal path, and means for -mainta11nng each bar constantly in said path during its movement, of a shaft, meansmovable thereby for actuating each of said rackbars, and instrumentalities for operating said shaft. x

34. The com ination with a calculator, including a plurality of rack-bars, of a shaft, a wheel on said shaft arranged to engage the aforementioned rack-bars, and instrumentalities for turning the shaft. I

35. The combination with a calculator, includinga plurality of rack-bars, of arockshaft, a wheel on said shaft for engagement with the rack-bars, finger-keys, toothed arms connected to the finger-keys, and pin-- ions on said rock-shaft adapted to be operated by the aforesaid arms.

36. The combination with a calculator .including a plurality of bars having teeth at opposite ends thereof, of a rock-shaft, a wheel on said rock-shaft, for engagementwith the teeth at one end of said bars, print, in keys, toothed arms connected to the printing keys, and pinions on the aforementioned shaft arranged to be engaged by said toothed arms. 1

37. machine of the class described ined thereon, toothed segments, also mounted;

on said shaft and carrying spring-actuated pawls engaging with said gears, a series of raclobars normally in engagement with the toothed segments-and slidable in two directions in the same longitudinal path, carrying mechanism interposed between each of the number-wheels and controlled by the movement of the number-wheels vwhen actuated by said rack-bars through said gears, a carriage adapted to travel in juxtaposition to said "rack-bars, and'means carried by the carriage and adapted to cooperate with said rack' bars to effect their movement.

88. In combination, a calculator including a casing and a number-wheel housed therein, means partly housed within the calculator-casing and extending to a point out side of said casing, said means adapted to operate the number-Wheel and includinga slidable-member, a gear housed within the casing and meshing with said slidable member, means also housed within the casing for [preventing retrograde movement of said gear, and a traveling key-actuated mechanism adapted tobe juxtaposed to said slldable member and operating to actuate it.

39. In combination, a calculator including a casing and a number-wheel housed there in, means partly housed within the calculator-casing and extending to a point out side of said casing, said means adapted to operate the number-wheel and including a slidable-member, a gear housed within the casing and meshing with said slidable mem-' ber, means including a pawl also housed within the casing for preventing retrograde movement of said gear, and a traveling keyactuated mechanism adapted to be juxtaposed to said slidable member and operating to actuate it.

In testimony whereof, I affix my signature, in the presence of two subscribing witnesses.

EDWARD C. WALTER. Witnesses EDMUND I-I. PARRY, -W. L. BILLMYER.

, MM Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

